STAGE Offre de stage : Circular Rydberg atoms of Strontium for quantum metrology and quantum simulation.

Date de mise à jour de l’offre

Laboratoire Kastler Brossel, Collège de France, Paris :

Le Laboratoire Kastler Brossel est un des acteurs majeurs dans le domaine de la physique quantique. Ses thématiques abordent de nombreux aspects depuis les tests fondamentaux de la théorie quantique jusqu’aux applications, couvrant ainsi une large gamme de sujets tels que les gaz quantiques, l’optique et l’information quantiques, les atomes et la lumière dans les milieux denses ou complexes, les tests des interactions fondamentales et la métrologie.

Description de la mission

aboratoire Kastler Brossel, Collège de France, Paris
Cavity Quantum Electrodynamics group (www.cqed.org)
Supervisors:
Michel Brune (michel.brune@lkb.ens.fr)
Sébastien Gleyzes (gleyzes@lkb.ens.fr)
Thesis possibility after internship: YES
Funding: ERC Trenscrybe
Scientific context:
Rydberg atoms are highly excited atomic levels for
which the electron is far away from the nucleus and
only sees the 1/r-potential of the atomic core. The
spatial extension of the electron wavefunction and
their very long lifetime make them of great interest
for quantum metrology and quantum simulation.
We have used rubidium Rydberg atoms prepared in
non-classical Schrödinger cat states to measure
electric or magnetic field with an unprecedented
precision, well below the standard quantum limit [1]. Chain of circular Rydberg atom,
trapped deterministically, would also open very promising perspectives for quantum
simulations of spin systems [2].
The objective of this project is to develop a Rydberg experiment based on strontium. Being
an alkali-earth element, the strontium possesses two valences electrons, leaving an optically
active ionic core once one of the electrons is promoted to the Rydberg states. The second
electron can thus be used to detect the atom by fluorescence, allowing for instance to
obtain a spatial image of the electromagnetic field that the atoms are measuring. The ionic
core optical transition also enables to implement standard cold-atom techniques to lasercool the atoms once in the Rydberg states. This opens very exciting perspectives for
quantum simulation, where the motion of atom is often the limiting factor that prevent from
observing the long-term dynamics of the system.
Project:
The purpose of the internship will be the preparation of circular Rydberg atom of strontium.
We will use the existing rubidium setup and build a new optical table with the laser to excite
Rydberg level of strontium. We will then characterize the circular levels and observe the first
fluorescence signal.

Profil recherché

M2

Niveau de qualification requis

Bac + 4/5 et +
  • Employeur
    Laboratoire Kastler Brossel, Collège de France, Paris
  • Secteur d’activité de la structure
    Enseignement - Formation - Recherche
  • Effectif de la structure
    De 51 à 250 salariés
  • Site internet de la structure
    https://www.lkb.upmc.fr
  • Type de stage ou contrat
    Stage pour lycéens et étudiants en formation initiale
  • Date prévisionnelle de démarrage
  • Durée du stage ou contrat
    Plus de 4 mois et jusqu'à 6 mois
  • Le stage est-il rémunéré ?
    Oui
  • Niveau de qualification requis

    Bac + 4/5 et +
  • Lieu du stage
    LKB ENS Paris
    24 Rue Lhomond
    75005 PARIS 5E ARRONDISSEMENT
  • Accès et transports
    RER B Luxembourg